3x+21=42+3x

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Solution for 3x+21=42+3x equation: 


Simplifying
3x + 21 = 42 + 3x

Reorder the terms:
21 + 3x = 42 + 3x

Add '-3x' to each side of the equation.
21 + 3x + -3x = 42 + 3x + -3x

Combine like terms: 3x + -3x = 0
21 + 0 = 42 + 3x + -3x
21 = 42 + 3x + -3x

Combine like terms: 3x + -3x = 0
21 = 42 + 0
21 = 42

Solving
21 = 42

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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